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/* Copyright (C) 1991-2024 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #ifndef _NETINET_IN_H #define _NETINET_IN_H 1 #include <features.h> #include <bits/stdint-uintn.h> #include <sys/socket.h> #include <bits/types.h> __BEGIN_DECLS /* Internet address. */ typedef uint32_t in_addr_t; struct in_addr { in_addr_t s_addr; }; /* Get system-specific definitions. */ #include <bits/in.h> /* Standard well-defined IP protocols. */ enum { IPPROTO_IP = 0, /* Dummy protocol for TCP. */ #define IPPROTO_IP IPPROTO_IP IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */ #define IPPROTO_ICMP IPPROTO_ICMP IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */ #define IPPROTO_IGMP IPPROTO_IGMP IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94). */ #define IPPROTO_IPIP IPPROTO_IPIP IPPROTO_TCP = 6, /* Transmission Control Protocol. */ #define IPPROTO_TCP IPPROTO_TCP IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */ #define IPPROTO_EGP IPPROTO_EGP IPPROTO_PUP = 12, /* PUP protocol. */ #define IPPROTO_PUP IPPROTO_PUP IPPROTO_UDP = 17, /* User Datagram Protocol. */ #define IPPROTO_UDP IPPROTO_UDP IPPROTO_IDP = 22, /* XNS IDP protocol. */ #define IPPROTO_IDP IPPROTO_IDP IPPROTO_TP = 29, /* SO Transport Protocol Class 4. */ #define IPPROTO_TP IPPROTO_TP IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol. */ #define IPPROTO_DCCP IPPROTO_DCCP IPPROTO_IPV6 = 41, /* IPv6 header. */ #define IPPROTO_IPV6 IPPROTO_IPV6 IPPROTO_RSVP = 46, /* Reservation Protocol. */ #define IPPROTO_RSVP IPPROTO_RSVP IPPROTO_GRE = 47, /* General Routing Encapsulation. */ #define IPPROTO_GRE IPPROTO_GRE IPPROTO_ESP = 50, /* encapsulating security payload. */ #define IPPROTO_ESP IPPROTO_ESP IPPROTO_AH = 51, /* authentication header. */ #define IPPROTO_AH IPPROTO_AH IPPROTO_MTP = 92, /* Multicast Transport Protocol. */ #define IPPROTO_MTP IPPROTO_MTP IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET. */ #define IPPROTO_BEETPH IPPROTO_BEETPH IPPROTO_ENCAP = 98, /* Encapsulation Header. */ #define IPPROTO_ENCAP IPPROTO_ENCAP IPPROTO_PIM = 103, /* Protocol Independent Multicast. */ #define IPPROTO_PIM IPPROTO_PIM IPPROTO_COMP = 108, /* Compression Header Protocol. */ #define IPPROTO_COMP IPPROTO_COMP IPPROTO_L2TP = 115, /* Layer 2 Tunnelling Protocol. */ #define IPPROTO_L2TP IPPROTO_L2TP IPPROTO_SCTP = 132, /* Stream Control Transmission Protocol. */ #define IPPROTO_SCTP IPPROTO_SCTP IPPROTO_UDPLITE = 136, /* UDP-Lite protocol. */ #define IPPROTO_UDPLITE IPPROTO_UDPLITE IPPROTO_MPLS = 137, /* MPLS in IP. */ #define IPPROTO_MPLS IPPROTO_MPLS IPPROTO_ETHERNET = 143, /* Ethernet-within-IPv6 Encapsulation. */ #define IPPROTO_ETHERNET IPPROTO_ETHERNET IPPROTO_RAW = 255, /* Raw IP packets. */ #define IPPROTO_RAW IPPROTO_RAW IPPROTO_MPTCP = 262, /* Multipath TCP connection. */ #define IPPROTO_MPTCP IPPROTO_MPTCP IPPROTO_MAX }; /* If __USE_KERNEL_IPV6_DEFS is 1 then the user has included the kernel network headers first and we should use those ABI-identical definitions instead of our own, otherwise 0. */ #if !__USE_KERNEL_IPV6_DEFS enum { IPPROTO_HOPOPTS = 0, /* IPv6 Hop-by-Hop options. */ #define IPPROTO_HOPOPTS IPPROTO_HOPOPTS IPPROTO_ROUTING = 43, /* IPv6 routing header. */ #define IPPROTO_ROUTING IPPROTO_ROUTING IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header. */ #define IPPROTO_FRAGMENT IPPROTO_FRAGMENT IPPROTO_ICMPV6 = 58, /* ICMPv6. */ #define IPPROTO_ICMPV6 IPPROTO_ICMPV6 IPPROTO_NONE = 59, /* IPv6 no next header. */ #define IPPROTO_NONE IPPROTO_NONE IPPROTO_DSTOPTS = 60, /* IPv6 destination options. */ #define IPPROTO_DSTOPTS IPPROTO_DSTOPTS IPPROTO_MH = 135 /* IPv6 mobility header. */ #define IPPROTO_MH IPPROTO_MH }; #endif /* !__USE_KERNEL_IPV6_DEFS */ /* Type to represent a port. */ typedef uint16_t in_port_t; /* Standard well-known ports. */ enum { IPPORT_ECHO = 7, /* Echo service. */ IPPORT_DISCARD = 9, /* Discard transmissions service. */ IPPORT_SYSTAT = 11, /* System status service. */ IPPORT_DAYTIME = 13, /* Time of day service. */ IPPORT_NETSTAT = 15, /* Network status service. */ IPPORT_FTP = 21, /* File Transfer Protocol. */ IPPORT_TELNET = 23, /* Telnet protocol. */ IPPORT_SMTP = 25, /* Simple Mail Transfer Protocol. */ IPPORT_TIMESERVER = 37, /* Timeserver service. */ IPPORT_NAMESERVER = 42, /* Domain Name Service. */ IPPORT_WHOIS = 43, /* Internet Whois service. */ IPPORT_MTP = 57, IPPORT_TFTP = 69, /* Trivial File Transfer Protocol. */ IPPORT_RJE = 77, IPPORT_FINGER = 79, /* Finger service. */ IPPORT_TTYLINK = 87, IPPORT_SUPDUP = 95, /* SUPDUP protocol. */ IPPORT_EXECSERVER = 512, /* execd service. */ IPPORT_LOGINSERVER = 513, /* rlogind service. */ IPPORT_CMDSERVER = 514, IPPORT_EFSSERVER = 520, /* UDP ports. */ IPPORT_BIFFUDP = 512, IPPORT_WHOSERVER = 513, IPPORT_ROUTESERVER = 520, /* Ports less than this value are reserved for privileged processes. */ IPPORT_RESERVED = 1024, /* Ports greater this value are reserved for (non-privileged) servers. */ IPPORT_USERRESERVED = 5000 }; /* Definitions of the bits in an Internet address integer. On subnets, host and network parts are found according to the subnet mask, not these masks. */ #define IN_CLASSA(a) ((((in_addr_t)(a)) & 0x80000000) == 0) #define IN_CLASSA_NET 0xff000000 #define IN_CLASSA_NSHIFT 24 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) #define IN_CLASSA_MAX 128 #define IN_CLASSB(a) ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000) #define IN_CLASSB_NET 0xffff0000 #define IN_CLASSB_NSHIFT 16 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) #define IN_CLASSB_MAX 65536 #define IN_CLASSC(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000) #define IN_CLASSC_NET 0xffffff00 #define IN_CLASSC_NSHIFT 8 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) #define IN_CLASSD(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xe0000000) #define IN_MULTICAST(a) IN_CLASSD(a) #define IN_EXPERIMENTAL(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000) #define IN_BADCLASS(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000) /* Address to accept any incoming messages. */ #define INADDR_ANY ((in_addr_t) 0x00000000) /* Address to send to all hosts. */ #define INADDR_BROADCAST ((in_addr_t) 0xffffffff) /* Address indicating an error return. */ #define INADDR_NONE ((in_addr_t) 0xffffffff) /* Dummy address for source of ICMPv6 errors converted to IPv4 (RFC 7600). */ #define INADDR_DUMMY ((in_addr_t) 0xc0000008) /* Network number for local host loopback. */ #define IN_LOOPBACKNET 127 /* Address to loopback in software to local host. */ #ifndef INADDR_LOOPBACK # define INADDR_LOOPBACK ((in_addr_t) 0x7f000001) /* Inet 127.0.0.1. */ #endif /* Defines for Multicast INADDR. */ #define INADDR_UNSPEC_GROUP ((in_addr_t) 0xe0000000) /* 224.0.0.0 */ #define INADDR_ALLHOSTS_GROUP ((in_addr_t) 0xe0000001) /* 224.0.0.1 */ #define INADDR_ALLRTRS_GROUP ((in_addr_t) 0xe0000002) /* 224.0.0.2 */ #define INADDR_ALLSNOOPERS_GROUP ((in_addr_t) 0xe000006a) /* 224.0.0.106 */ #define INADDR_MAX_LOCAL_GROUP ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */ #if !__USE_KERNEL_IPV6_DEFS /* IPv6 address */ struct in6_addr { union { uint8_t __u6_addr8[16]; uint16_t __u6_addr16[8]; uint32_t __u6_addr32[4]; } __in6_u; #define s6_addr __in6_u.__u6_addr8 #ifdef __USE_MISC # define s6_addr16 __in6_u.__u6_addr16 # define s6_addr32 __in6_u.__u6_addr32 #endif }; #endif /* !__USE_KERNEL_IPV6_DEFS */ extern const struct in6_addr in6addr_any; /* :: */ extern const struct in6_addr in6addr_loopback; /* ::1 */ #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } #define INET_ADDRSTRLEN 16 #define INET6_ADDRSTRLEN 46 /* Structure describing an Internet socket address. */ struct sockaddr_in { __SOCKADDR_COMMON (sin_); in_port_t sin_port; /* Port number. */ struct in_addr sin_addr; /* Internet address. */ /* Pad to size of `struct sockaddr'. */ unsigned char sin_zero[sizeof (struct sockaddr) - __SOCKADDR_COMMON_SIZE - sizeof (in_port_t) - sizeof (struct in_addr)]; }; #if !__USE_KERNEL_IPV6_DEFS /* Ditto, for IPv6. */ struct sockaddr_in6 { __SOCKADDR_COMMON (sin6_); in_port_t sin6_port; /* Transport layer port # */ uint32_t sin6_flowinfo; /* IPv6 flow information */ struct in6_addr sin6_addr; /* IPv6 address */ uint32_t sin6_scope_id; /* IPv6 scope-id */ }; #endif /* !__USE_KERNEL_IPV6_DEFS */ #ifdef __USE_MISC /* IPv4 multicast request. */ struct ip_mreq { /* IP multicast address of group. */ struct in_addr imr_multiaddr; /* Local IP address of interface. */ struct in_addr imr_interface; }; /* IPv4 multicast request with interface index. */ struct ip_mreqn { /* IP multicast address of group. */ struct in_addr imr_multiaddr; /* Local IP address of interface. */ struct in_addr imr_address; /* Interface index. */ int imr_ifindex; }; struct ip_mreq_source { /* IP multicast address of group. */ struct in_addr imr_multiaddr; /* IP address of interface. */ struct in_addr imr_interface; /* IP address of source. */ struct in_addr imr_sourceaddr; }; #endif #if !__USE_KERNEL_IPV6_DEFS /* Likewise, for IPv6. */ struct ipv6_mreq { /* IPv6 multicast address of group */ struct in6_addr ipv6mr_multiaddr; /* local interface */ unsigned int ipv6mr_interface; }; #endif /* !__USE_KERNEL_IPV6_DEFS */ #ifdef __USE_MISC /* Multicast group request. */ struct group_req { /* Interface index. */ uint32_t gr_interface; /* Group address. */ struct sockaddr_storage gr_group; }; struct group_source_req { /* Interface index. */ uint32_t gsr_interface; /* Group address. */ struct sockaddr_storage gsr_group; /* Source address. */ struct sockaddr_storage gsr_source; }; /* Full-state filter operations. */ struct ip_msfilter { /* IP multicast address of group. */ struct in_addr imsf_multiaddr; /* Local IP address of interface. */ struct in_addr imsf_interface; /* Filter mode. */ uint32_t imsf_fmode; /* Number of source addresses. */ uint32_t imsf_numsrc; /* Source addresses. */ struct in_addr imsf_slist[1]; }; #define IP_MSFILTER_SIZE(numsrc) (sizeof (struct ip_msfilter) \ - sizeof (struct in_addr) \ + (numsrc) * sizeof (struct in_addr)) struct group_filter { /* Interface index. */ uint32_t gf_interface; /* Group address. */ struct sockaddr_storage gf_group; /* Filter mode. */ uint32_t gf_fmode; /* Number of source addresses. */ uint32_t gf_numsrc; /* Source addresses. */ struct sockaddr_storage gf_slist[1]; }; #define GROUP_FILTER_SIZE(numsrc) (sizeof (struct group_filter) \ - sizeof (struct sockaddr_storage) \ + ((numsrc) \ * sizeof (struct sockaddr_storage))) #endif /* Functions to convert between host and network byte order. Please note that these functions normally take `unsigned long int' or `unsigned short int' values as arguments and also return them. But this was a short-sighted decision since on different systems the types may have different representations but the values are always the same. */ extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__)); extern uint16_t ntohs (uint16_t __netshort) __THROW __attribute__ ((__const__)); extern uint32_t htonl (uint32_t __hostlong) __THROW __attribute__ ((__const__)); extern uint16_t htons (uint16_t __hostshort) __THROW __attribute__ ((__const__)); #include <endian.h> /* Get machine dependent optimized versions of byte swapping functions. */ #include <bits/byteswap.h> #include <bits/uintn-identity.h> #ifdef __OPTIMIZE__ /* We can optimize calls to the conversion functions. Either nothing has to be done or we are using directly the byte-swapping functions which often can be inlined. */ # if __BYTE_ORDER == __BIG_ENDIAN /* The host byte order is the same as network byte order, so these functions are all just identity. */ # define ntohl(x) __uint32_identity (x) # define ntohs(x) __uint16_identity (x) # define htonl(x) __uint32_identity (x) # define htons(x) __uint16_identity (x) # else # if __BYTE_ORDER == __LITTLE_ENDIAN # define ntohl(x) __bswap_32 (x) # define ntohs(x) __bswap_16 (x) # define htonl(x) __bswap_32 (x) # define htons(x) __bswap_16 (x) # endif # endif #endif #ifdef __GNUC__ # define IN6_IS_ADDR_UNSPECIFIED(a) \ (__extension__ \ ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ __a->__in6_u.__u6_addr32[0] == 0 \ && __a->__in6_u.__u6_addr32[1] == 0 \ && __a->__in6_u.__u6_addr32[2] == 0 \ && __a->__in6_u.__u6_addr32[3] == 0; })) # define IN6_IS_ADDR_LOOPBACK(a) \ (__extension__ \ ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ __a->__in6_u.__u6_addr32[0] == 0 \ && __a->__in6_u.__u6_addr32[1] == 0 \ && __a->__in6_u.__u6_addr32[2] == 0 \ && __a->__in6_u.__u6_addr32[3] == htonl (1); })) # define IN6_IS_ADDR_LINKLOCAL(a) \ (__extension__ \ ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfe800000); })) # define IN6_IS_ADDR_SITELOCAL(a) \ (__extension__ \ ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfec00000); })) # define IN6_IS_ADDR_V4MAPPED(a) \ (__extension__ \ ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ __a->__in6_u.__u6_addr32[0] == 0 \ && __a->__in6_u.__u6_addr32[1] == 0 \ && __a->__in6_u.__u6_addr32[2] == htonl (0xffff); })) # define IN6_IS_ADDR_V4COMPAT(a) \ (__extension__ \ ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ __a->__in6_u.__u6_addr32[0] == 0 \ && __a->__in6_u.__u6_addr32[1] == 0 \ && __a->__in6_u.__u6_addr32[2] == 0 \ && ntohl (__a->__in6_u.__u6_addr32[3]) > 1; })) # define IN6_ARE_ADDR_EQUAL(a,b) \ (__extension__ \ ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ const struct in6_addr *__b = (const struct in6_addr *) (b); \ __a->__in6_u.__u6_addr32[0] == __b->__in6_u.__u6_addr32[0] \ && __a->__in6_u.__u6_addr32[1] == __b->__in6_u.__u6_addr32[1] \ && __a->__in6_u.__u6_addr32[2] == __b->__in6_u.__u6_addr32[2] \ && __a->__in6_u.__u6_addr32[3] == __b->__in6_u.__u6_addr32[3]; })) #else # define IN6_IS_ADDR_UNSPECIFIED(a) \ (((const uint32_t *) (a))[0] == 0 \ && ((const uint32_t *) (a))[1] == 0 \ && ((const uint32_t *) (a))[2] == 0 \ && ((const uint32_t *) (a))[3] == 0) # define IN6_IS_ADDR_LOOPBACK(a) \ (((const uint32_t *) (a))[0] == 0 \ && ((const uint32_t *) (a))[1] == 0 \ && ((const uint32_t *) (a))[2] == 0 \ && ((const uint32_t *) (a))[3] == htonl (1)) # define IN6_IS_ADDR_LINKLOCAL(a) \ ((((const uint32_t *) (a))[0] & htonl (0xffc00000)) \ == htonl (0xfe800000)) # define IN6_IS_ADDR_SITELOCAL(a) \ ((((const uint32_t *) (a))[0] & htonl (0xffc00000)) \ == htonl (0xfec00000)) # define IN6_IS_ADDR_V4MAPPED(a) \ ((((const uint32_t *) (a))[0] == 0) \ && (((const uint32_t *) (a))[1] == 0) \ && (((const uint32_t *) (a))[2] == htonl (0xffff))) # define IN6_IS_ADDR_V4COMPAT(a) \ ((((const uint32_t *) (a))[0] == 0) \ && (((const uint32_t *) (a))[1] == 0) \ && (((const uint32_t *) (a))[2] == 0) \ && (ntohl (((const uint32_t *) (a))[3]) > 1)) # define IN6_ARE_ADDR_EQUAL(a,b) \ ((((const uint32_t *) (a))[0] == ((const uint32_t *) (b))[0]) \ && (((const uint32_t *) (a))[1] == ((const uint32_t *) (b))[1]) \ && (((const uint32_t *) (a))[2] == ((const uint32_t *) (b))[2]) \ && (((const uint32_t *) (a))[3] == ((const uint32_t *) (b))[3])) #endif #define IN6_IS_ADDR_MULTICAST(a) (((const uint8_t *) (a))[0] == 0xff) #ifdef __USE_MISC /* Bind socket to a privileged IP port. */ extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW; /* The IPv6 version of this function. */ extern int bindresvport6 (int __sockfd, struct sockaddr_in6 *__sock_in) __THROW; #endif #define IN6_IS_ADDR_MC_NODELOCAL(a) \ (IN6_IS_ADDR_MULTICAST(a) \ && ((((const uint8_t *) (a))[1] & 0xf) == 0x1)) #define IN6_IS_ADDR_MC_LINKLOCAL(a) \ (IN6_IS_ADDR_MULTICAST(a) \ && ((((const uint8_t *) (a))[1] & 0xf) == 0x2)) #define IN6_IS_ADDR_MC_SITELOCAL(a) \ (IN6_IS_ADDR_MULTICAST(a) \ && ((((const uint8_t *) (a))[1] & 0xf) == 0x5)) #define IN6_IS_ADDR_MC_ORGLOCAL(a) \ (IN6_IS_ADDR_MULTICAST(a) \ && ((((const uint8_t *) (a))[1] & 0xf) == 0x8)) #define IN6_IS_ADDR_MC_GLOBAL(a) \ (IN6_IS_ADDR_MULTICAST(a) \ && ((((const uint8_t *) (a))[1] & 0xf) == 0xe)) #ifdef __USE_GNU struct cmsghdr; /* Forward declaration. */ #if !__USE_KERNEL_IPV6_DEFS /* IPv6 packet information. */ struct in6_pktinfo { struct in6_addr ipi6_addr; /* src/dst IPv6 address */ unsigned int ipi6_ifindex; /* send/recv interface index */ }; /* IPv6 MTU information. */ struct ip6_mtuinfo { struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */ uint32_t ip6m_mtu; /* path MTU in host byte order */ }; #endif /* !__USE_KERNEL_IPV6_DEFS */ /* Obsolete hop-by-hop and Destination Options Processing (RFC 2292). */ extern int inet6_option_space (int __nbytes) __THROW __attribute_deprecated__; extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp, int __type) __THROW __attribute_deprecated__; extern int inet6_option_append (struct cmsghdr *__cmsg, const uint8_t *__typep, int __multx, int __plusy) __THROW __attribute_deprecated__; extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen, int __multx, int __plusy) __THROW __attribute_deprecated__; extern int inet6_option_next (const struct cmsghdr *__cmsg, uint8_t **__tptrp) __THROW __attribute_deprecated__; extern int inet6_option_find (const struct cmsghdr *__cmsg, uint8_t **__tptrp, int __type) __THROW __attribute_deprecated__; /* Hop-by-Hop and Destination Options Processing (RFC 3542). */ extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW; extern int inet6_opt_append (void *__extbuf, socklen_t __extlen, int __offset, uint8_t __type, socklen_t __len, uint8_t __align, void **__databufp) __THROW; extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset) __THROW; extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val, socklen_t __vallen) __THROW; extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset, uint8_t *__typep, socklen_t *__lenp, void **__databufp) __THROW; extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset, uint8_t __type, socklen_t *__lenp, void **__databufp) __THROW; extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val, socklen_t __vallen) __THROW; /* Routing Header Option (RFC 3542). */ extern socklen_t inet6_rth_space (int __type, int __segments) __THROW; extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type, int __segments) __THROW; extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW; extern int inet6_rth_reverse (const void *__in, void *__out) __THROW; extern int inet6_rth_segments (const void *__bp) __THROW; extern struct in6_addr *inet6_rth_getaddr (const void *__bp, int __index) __THROW; /* Multicast source filter support. */ /* Get IPv4 source filter. */ extern int getipv4sourcefilter (int __s, struct in_addr __interface_addr, struct in_addr __group, uint32_t *__fmode, uint32_t *__numsrc, struct in_addr *__slist) __THROW; /* Set IPv4 source filter. */ extern int setipv4sourcefilter (int __s, struct in_addr __interface_addr, struct in_addr __group, uint32_t __fmode, uint32_t __numsrc, const struct in_addr *__slist) __THROW; /* Get source filter. */ extern int getsourcefilter (int __s, uint32_t __interface_addr, const struct sockaddr *__group, socklen_t __grouplen, uint32_t *__fmode, uint32_t *__numsrc, struct sockaddr_storage *__slist) __THROW; /* Set source filter. */ extern int setsourcefilter (int __s, uint32_t __interface_addr, const struct sockaddr *__group, socklen_t __grouplen, uint32_t __fmode, uint32_t __numsrc, const struct sockaddr_storage *__slist) __THROW; #endif /* use GNU */ __END_DECLS #endif /* netinet/in.h */